Structure of the Earth Flashcards by Jack Murphy | Brainscape

Q

Whats the sequence

A

Crust
Mantle
Outer Core
Inner Core

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Q

How thick is the crust and whats it made of

A

100km thick

Oceanic and Continental crust

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Q

How hots the mantle

A

3000 degrees c

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Q

What compounds are in the mantle

A

iron
Magnesium
Sulfides
Silicon

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Q

How hot is the outer core

A

4500 degrees c

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Q

What state is it in

A

liquid

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Q

What compounds are present

A

Iron

Nickel

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Q

How is magnetic field created

A

Inner core is so hot it melts the outer core

Outer core moves around the inner core

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Q

How hot is the inner core

A

6000 degrees c

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Q

What state is the inner core in

A

solid

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Q

What are the two types of crust

A

Oceanic

Continental

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Q

Thickness of crusts

A

Oceanic - 6-10km

Continental - 30-70km

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Q

Age of the crusts

A

Oceanic - less than 200 million years

Continental - 1500 million years +

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Q

Density of crusts

A

Oceanic - 3.0 g/cm3 (denser)

Continental - 2.6 g/cm3 (lighter)

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Q

Composition of crust

A

Oceanic - basalt

Continental - granite

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